JSON解析并接收到：致命错误：在展开可选值时意外发现nil

Question

override func viewDidLoad() {
    super.viewDidLoad()
    let reposURL = NSURL(string: "https://maps.googleapis.com/maps/api/place/nearbysearch/json?key=AIzaSyC4BR5rZLNkeGChLr8N00BHZqBYqPdrgjg&location=43.690578,-79.342348&radius=400&types=cafe|bakery")
    // 2
    if let JSONData = NSData(contentsOfURL: reposURL!) {
        // 3
        if let json = NSJSONSerialization.JSONObjectWithData(JSONData, options: nil, error: nil) as? NSDictionary {
            // 4
            if let reposArray = json["items"] as? [NSDictionary] {
                // 5
                for item in reposArray {
                    repositories.append(Repository(json: item))
                }
            }
        }
    }
}

receiving a exc_bad_instruction error @ line 5 and not sure why, its saying im force unwrapping nil but the URL is working and i can open it in my browser without an issue and see all the JSON data

Answer 1

Encode your URL with NSUTF8StringEncoding :

var urlstr = "https://maps.googleapis.com/maps/api/place/nearbysearch/json?key=AIzaSyC4BR5rZLNkeGChLr8N00BHZqBYqPdrgjg&location=43.690578,-79.342348&radius=400&types=cafe|bakery"

var escapedString = urlstr.stringByAddingPercentEscapesUsingEncoding(NSUTF8StringEncoding)

let reposURL = NSURL(string: escapedString!)
// 2
if let JSONData = NSData(contentsOfURL: reposURL!) {
    // 3
    if let json = NSJSONSerialization.JSONObjectWithData(JSONData, options: nil, error: nil) as? NSDictionary {
        // 4
        print(json)
        if let reposArray = json["results"] as? [NSDictionary] {
            // 5
            for item in reposArray {
                print(item)// You will get particular items 
            }
        }
    }
}

Then you will get your JSON response.

In the response there is no parameters like items .

So, after the print(json) check the response and get the data by the parameters.

Hope this helps you.

Answer 2

With Swift 2 the signature for NSJSONSerialization has changed, to conform to the new error handling system. Here is the same answer as @ashish-kakkad proposed, but updated to Swift 2

    var urlstr = "https://maps.googleapis.com/maps/api/place/nearbysearch/json?key=AIzaSyC4BR5rZLNkeGChLr8N00BHZqBYqPdrgjg&location=43.690578,-79.342348&radius=400&types=cafe|bakery"

        var escapedString = urlstr.stringByAddingPercentEscapesUsingEncoding(NSUTF8StringEncoding)

        let reposURL = NSURL(string: escapedString!)
        // 2
        if let JSONData = NSData(contentsOfURL: reposURL!) {
            // 3
                do {
                    if let json = try NSJSONSerialization.JSONObjectWithData(JSONData, options: []) as? NSDictionary {
                        // 4
                        print(json)
                        if let reposArray = json["results"] as? [NSDictionary] {
                            // 5
                            for item in reposArray {
                                print(item)// You will get particular items
                            }
                        }
                    }
                } catch let error as NSError {
                    print(error.localizedDescription)
                }
        }